81120010202 has 32 divisors (see below), whose sum is σ = 160628780160. Its totient is φ = 29746068480.

The previous prime is 81120010177. The next prime is 81120010271. The reversal of 81120010202 is 20201002118.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15490127 + ... + 15495362.

It is an arithmetic number, because the mean of its divisors is an integer number (5019649380).

Almost surely, 2^81120010202 is an apocalyptic number.

81120010202 is a deficient number, since it is larger than the sum of its proper divisors (79508769958).

81120010202 is a wasteful number, since it uses less digits than its factorization.

81120010202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30985526.

The product of its (nonzero) digits is 64, while the sum is 17.

The spelling of 81120010202 in words is "eighty-one billion, one hundred twenty million, ten thousand, two hundred two".